package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserLoginService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import com.sky.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserLoginServiceImpl implements UserLoginService {

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    @Override
    public User login(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());

        if(openid ==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
//        传递的错误信息 msg 会被传递给 父类统一处理（例如，存储在内部变量中）。
//        当捕获到这个异常时，可以通过调用 getMessage() 方法获取到详细的错误信息。
//        调用父类的有参构造方法是为了确保错误信息能够被正确地传递和处理。


        //判断当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);

        if(user == null){
            user =User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();

            userMapper.insert(user);
        }
        //返回这个用户对象
        return user;
    }

    // 调用微信接口服务，获取微信用户的openid
    private String getOpenid(String code){
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;

    }

}
